Annual report pursuant to Section 13 and 15(d)

The Company and Its Significant Accounting Policies (Details)

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The Company and Its Significant Accounting Policies (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Sep. 25, 2011
Sep. 26, 2010
Sep. 27, 2009
Notes to Financial Statements [Abstract]      
Number of weeks in a fiscal period 52 weeks 52 weeks 52 weeks
Securities Lending [Abstract]      
Marketable securities loaned under the Company's securities lending program $ 44 $ 0  
Collateral received for marketable securities loaned 46    
Derivatives [Abstract]      
Foreign currency option contracts recorded in other current assets 17 4  
Foreign currency option contracts recorded in other current liabilities 42 19  
Foreign currency forward contracts recorded in other current assets 7    
Foreign currency put option contracts derivative liabilities at fair value 80 0 0
Revenue Recognition [Abstract]      
Revenues from services less than 10%    
License fees recognized over estimated period of license benefit, duration 5 to 15 years    
Share-Based Compensation [Abstract]      
Weighted-average estimated fair value of employee stock options granted, per share $ 13.17 $ 12.40 $ 14.27
Period during which the term structure of volatility is used (in years) 2    
Expected life of employee stock options granted, in years 5.6 5.5 5.6
Weighted-average estimated fair values of employee RSUs granted, per share $ 50.14 $ 35.61 $ 0.00
Pre-vesting forfeiture rate 3.00% 3.00%  
Share-based compensation expense related to share-based award granted in those periods 165 119 106
Incremental tax benefit from stock options exercised 183 45 79
Foreign Currency [Abstract]      
Foreign currency transaction losses 8 6  
Income Tax Uncertainties [Abstract]      
Income tax uncertainties, minimum likelihood percentage of being realized upon settlement 50.00%    
Incremental Dilutive Common Share Equivalents [Abstract]      
Incremental dilutive common share equivalents 32,908,000 15,652,000 16,900,000
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]      
Accumulated other-than-temporary losses on marketable debt securities related to factors other than credit, net of income taxes 13    
Comprehensive Income [Abstract]      
Noncredit other-than-temporary impairment losses and subsequent changes in fair value related to certain marketable debt securities, income tax effect 10 (5) 12
Net unrealized (losses) gains on other marketable securities and derivative instruments, income tax effect 80 74 (5)
Reclassification of net realized gains on marketable securities and derivative instruments included in net income, income tax effect 112 (12) 75
Reclassification of other-than-temporary losses on marketable securities included in net income, income tax effect $ 14 $ (5) $ 130